BATON ROUGE, La. – One Louisiana teen has been charged with assault and another with saving the day: The first knocked a school bus driver unconscious and the second prevented the bus from crashing.

Baton Rouge police and school officials say the 26-year-old female driver had stopped the bus Thursday afternoon to exchange words with a student who was unruly. Police Department spokesman Cpl. L'Jean McKneely said the driver told authorities the 15-year-old boy then walked up behind her and punched her several times in the head, knocking her unconscious.

Schools spokesman Keith Bromery said the bus started to move after the unconscious driver's hands and feet slipped off the wheel and brakes. He said a 14-year-old male student ran forward and stepped on the brake, put the bus in park and called 911.